Oil-fired space heater



FIG. 1 is a front elevational view of an oil-fired space heater, showing my new design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof; and

FIG. 5 is a top plan view thereof.

The bottom surface of the oil-fired space heater is substantially planar and unornamental. 

The ornamental design for an oil-fired space heater, substantially as shown and described. 